package com.longyu.crowd.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.longyu.crowd.constant.CrowdConstant;
import com.longyu.crowd.entity.Admin;
import com.longyu.crowd.entity.AdminExample;
import com.longyu.crowd.exception.LoginAcctAlreadyInUserException;
import com.longyu.crowd.exception.LoginAcctAlreadyInUserForUpdateException;
import com.longyu.crowd.exception.LoginFailedException;
import com.longyu.crowd.mapper.AdminMapper;
import com.longyu.crowd.service.api.AdminService;
import com.longyu.crowd.util.CrowdUtil;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.stereotype.Service;
import sun.plugin2.message.Message;

import javax.servlet.http.HttpSession;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Objects;
import java.util.logging.Logger;

@Service
public class AdminServiceImpl implements AdminService {

    @Autowired
    private AdminMapper adminMapper;



    public void saveAdmin(Admin admin) {

        // 1.密码加密
        String userPwd = admin.getUserPswd();
        userPwd = CrowdUtil.md5(userPwd);
        admin.setUserPswd(userPwd);

        // 2.生成创建时间
        Date date = new Date();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String createTime = format.format(date);
        admin.setCreateTime(createTime);

        // 3.执行保存
        try {
            adminMapper.insert(admin);
        } catch (Exception e) {
            e.printStackTrace();

            if(e instanceof DuplicateKeyException){
                throw new LoginAcctAlreadyInUserException(CrowdConstant.MESSAGE_LOGIN_ACCT_ALREADY_IN_USE);
            }
        }

    }

    public List<Admin> getAll() {
        return adminMapper.selectByExample(new AdminExample());
    }

    public Admin getAdminByLoginAcct(String loginAcct, String userPswd) {

        // 1.根据登录账号查询Admin对象
        // ①创建AdminExample对象
        AdminExample adminExample = new AdminExample();

        // ②创建Criteria对象
        AdminExample.Criteria criteria = adminExample.createCriteria();

        // ③在Criteria对象中封装查询条件
        criteria.andLoginAcctEqualTo(loginAcct);

        // ④调用AdminMapper的方法执行查询
        List<Admin> list = adminMapper.selectByExample(adminExample);

        // 2.判断Admin对象是否为null
        if(list == null || list.size() == 0){
            throw new LoginFailedException(CrowdConstant.MESSAGE_LOGIN_FAILED);
        }

        if(list.size()>1){
            throw new RuntimeException(CrowdConstant.MESSAGE_SYSTEM_ERROR_LOGIN_NOT_UNIQUE);
        }

        Admin admin = list.get(0);

        // 3.如果Admin对象为null则抛出异常
        if(admin == null){
            throw new LoginFailedException(CrowdConstant.MESSAGE_LOGIN_FAILED);
        }

        // 4.如果Admin对象不为null则将数据库密码从Admin对象中取出
        String userPswdDB = admin.getUserPswd();

        // 5.将表单提交的明文密码进行加密
        String userPswdForm = CrowdUtil.md5(userPswd);

        // 6.对密码进行比较
        if(!Objects.equals(userPswdDB,userPswdForm)){
            // 7.如果比较结果不一致则抛出异常
            throw new LoginFailedException(CrowdConstant.MESSAGE_LOGIN_FAILED);
        }


        // 8.如果一致则返回Admin对象
        return admin;
    }

    @Override
    public PageInfo<Admin> getPageInfo(String keyword, Integer pageNum, Integer pageSize) {

        // 1.调用PageHelper的静态方法开启分页功能
        // 这里充分体现了PageHelper的“非入侵式”设计；原本要做到查询不必有任何修改
        PageHelper.startPage(pageNum,pageSize);

        // 2.执行查询
        List<Admin> list = adminMapper.selectAdminByKeyword(keyword);

        // 3.封装到PageInfo对象中
        return new PageInfo<>(list);
    }

    @Override
    public void remove(Integer adminId) {
        adminMapper.deleteByPrimaryKey(adminId);
    }

    @Override
    public Admin getAdminById(Integer adminId) {
        return adminMapper.selectByPrimaryKey(adminId);
    }

    @Override
    public void update(Admin admin) {
        try {
            // Selective有选择的去更新，对于null值的字段不更新  更新由优先键选择
            adminMapper.updateByPrimaryKeySelective(admin);
        } catch (Exception e) {
            e.printStackTrace();

            if(e instanceof DuplicateKeyException){
                throw new LoginAcctAlreadyInUserForUpdateException(CrowdConstant.MESSAGE_LOGIN_ACCT_ALREADY_IN_USE);
            }
        }
    }

    @Override
    public void saveAdminRoleRelationship(Integer adminId, List<Integer> roleIdList) {

        // 先删除旧的数据
        adminMapper.deleteOldRelationship(adminId);

        // 在保存新数据
        if(roleIdList != null && roleIdList.size() > 0){
            adminMapper.insertNewRelationship(adminId,roleIdList);
        }
    }

}
